# Body Surface Area Calculator

Meters:
1.97 m²
Feet:
6.46 ft²
Inches:
77.58 in²

Body surface area (BSA) is the calculated surface area of the human body. BSA is often used for medical purposes over bodyweight because it can provide a clearer evaluation of the body requirement for energy (metabolic mass).

Since it is difficult to obtain body surface area through direct measurement it is usually determined via a mathematical formula. There are several BSA formulas the most popular was published by D Du Bois and E F Du Bois in 1916 and provides an estimate of the approximate surface area if height and weight are known.

The Du Bois formula is shown below where BSA is in meter2, height is in centimetres and weight is in kilograms:

`BSA = 0.007184 * Height0.725 * Weight0.425`

This calculator uses the above Du Bois formula to provide body surface area calculation.

Here are some other BSA formulas:

### Mosteller formula:

`BSA = = 0.016667 × W0.5 × H0.5`

### Haycock formula:

`BSA = 0.024265 × W0.5378 × H0.3964`

### Gehan and George formula:

`BSA = 0.0235 × W0.51456 × H0.42246`

### Boyd formula:

`BSA = 0.03330 × W(0.6157 - 0.0188 × log10(W)) × H0.3`

### Fujimoto formula:

`BSA = 0.008883 × W0.444 × H0.663`

### Takahira formula:

`BSA = 0.007241 × W0.425 × H0.725`

### Schlich formula:

```Women BSA = 0.000975482 × W0.46 × H1.08

Men BSA = 0.000579479 × W0.38 × H1.24
```

## Mean Male BSA:

Age or age group metric imperial
Neonate (newborn) 0.243 m2 2.612 ft2
2 years 0.563 m2 6.060 ft2
5 years 0.787 m2 8.471 ft2
10 years 1.236 m2 13.304 ft2
13 years 1.603 m2 17.255 ft2
18 years 1.980 m2 21.313 ft2
20–79 years 2.060 m2 22.173 ft2
80+ years 1.920 m2 20.667 ft2

## Mean Female BSA:

Age or age group metric imperial
Neonate (newborn) 0.234 m2 2.519 ft2
2 years 0.540 m2 5.813 ft2
5 years 0.771 m2 8.299 ft2
10 years 1.245 m2 13.401 ft2
13 years 1.550 m2 16.684 ft2
18 years 1.726 m2 18.579 ft2
20–79 years 1.830 m2 19.697 ft2
80+ years 1.638 m2 17.631 ft2

You may also be interested in our BMI calculator.